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Update documentation with blog URL.
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@dilshan
dilshan committed May 9, 2019
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This is a library to generate DTMF tones only using *Arduino Uno*. It is designed to work with R-2R ladder based DAC to produce DTMF tones.

For more information about this library please check [jayakody2000lk.blogspot.com](jayakody2000lk.blogspot.com).
For more information about this library please check [jayakody2000lk.blogspot.com](https://jayakody2000lk.blogspot.com/2019/05/generate-dtmf-tones-only-using-arduino.html).

## Schematic

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